Sparking device.



H. H. MORETN.`

SPARKING DEVICE.

APPLCAT LOH HLED IULY 13.1914.

1 ,25%291 Patented Feb. 19, 1918.

SPARKING DEvIcE.

is invention relates to a sparking device capable of use for ignition purposes, or in connection with any i which, in operation, requires the passing of an1 electric spark between separated termina s.

One of the objects of t-he invention is to providea more intense spa-rk than has here- I provide means for increasing the number of sparking points Without decreasing the intensity of the current atanyof the sparking termmals and without necessitating an increase in current to maintain the same. .A further object is to provide a sparking device which will be simple in construction and eflicient in operation as an ignition device for explosive engines, and the like.

The invention will be hereinaft-er fully set forth and particularly pointed out in claims.

In the accompanying lrawingz- Figure 1 is a side elevation of a spark plug embodying my invention. Fig. 2 is a longitudinal sectional view thereof. Fig. 3 is a. similar view illustrating a' slight modification. Fig. is a transverse sectional view on the line 1-'-4, Fig. 2.

Referring to the drawing, designates an insulating block of any suitable material, such as mica, porcelain, or the like, and passing longitudinally through said insulating block is a central electrode or conductor 11, one end of which projects beyond the end of the insulating member to form a sparking terminal, as indicated at 12. desired, the other` end of the conductor ll may be threaded to form a binding post, as indicated at 13, by means of which the terminal 14 of an electrical conductor 15` leading from a suitable source of electricity, may be connected with said conductor 11. .The insulating block 10 is carried by a supporting bushing 16, in any suitable manner. the draw-img I have illustratcd saidinsulatging block as provided with an annular rib or shoulder 17 resting upon a correspond- Specification of Letters 'etent` Application filed uly 13, 1914.'

form of apparatus' extends.

4 Patented Feb. 19, 1918. Serial No. 850,768.

ingly shaped shoulder formed in the inner wall of the bushing, the bushing and insulating block being held together by a screw plug or packing nut 18. Suitable packing 19 is provided to maintain a gas The exterior of the threaded to permitv it to removably engage a correspondingly threaded opening lin the wall of an engine, or the like. Secured to central opening 21 correspondingin diameter to the diameter 'of' the insulating block 10, and into which the end of said block Said bridge member is preferably provided withan annular flange 22 which is secured to the insulating block in any suitable manner, to prevent relative movement of the bridge member. .and the insulating block. In theend of the bushing 16 I secure pins 23 bridge member. butwlo not contact therewith, thus providing a spark gap pin and the bridg'-member. The number of pins may be varicd at will, although I have illustrated fourpins equally spaced with respect to each other.

In operation,

its current through conductor 15, the rbushing 16 being groundel'i'iii the usua'l'manner. As the current passes through the, conduetor 11 Sparks will pass from the terminal 12 to the bridge member 20. he opening 21 forms an annular Chamber around the terminal 12 and the spark may jump in any direction, the normal intensity thereof being unimpaired. As soon a-s the spark reaches the bridge member it passes over the surface thereof and will jump 'from said bridge member to at least two of the pins 23 forming an intense spark in each instance, and from the pins passos to ground. Thus.. a spark plug` such as illustrated, when placedl within an engine cylinder, will insure igni- 'tion of the explosive mixture within said cylinder by reason of the double sparking that is effected by means of the bridge member. lt will be noted that the opening or chamber 21 is of such dimensions that the current will not be short circuited, except under extreme conditions, but even if it should become short circuited Sparks will pass from the bridge member to the pins 93.

In Fig. 3 I have shown a. slight modificabetween each ich. vextend opposite the the sparkin'g devicefreceives tion which consists in dnplieating` the bridge member., other Words a second bridge member 3G interposed between the bridge member 2G end the bushing 16, end said. bridge member 30 is provided with pins 31 foiniing gape for the current pessing from the bridge member 20. In this form of the invention the Spurl: passes from the terminal 12 to l ridge lmember 20, then juinps the gaps betweensaid bridge member and the pins 31 of the bridge member 30, and finally from the letter to the bushing 1G. in this manner three distinct sparking points ere provided, and it is obvious that any number of sparking points may be obtained by increesing' the number of bridge members.

wili be understood that while l heveiiluet.` .l and described niy inventien :ie applied to i gnition device, l do not deeire limit :any l' in this particular, es the inpable of use in connection With crm or appziratus in which e multipiic- *nrlring points may be desireble thus explaine. the nature ot in? I and described en operetive nienetmstructing and using the same, without ettempting to set forth all *ne forme in which it r'iav be made, or ell f its use, 'What chiini istng device of the. Character :le pris' an insuiating block, ;z rode extending therethrough, e i aiity ofv grounded eleetrodes errengcd around said insulating block, end substanparallel With the nxis thereof, end a e member secured to one end of' the n- -zing block and having a central recess receive the contiguous end of said central electrodc, said bridge member also having a fiot face extending transversely of the block end positioned opposite to the sparking terminale ot all of said grounded electrodes, :foi' consing' independent sperling et the ter- :ninzis of all of the electrodeen Wesfiington., E. CJ

E2. A sperking device of the eh entrai eleetrode e aracter deciibed comprising an insnieting block, e nding therethrough, a

block, e centnU elcctrode o t'ren god a round ee i d epzirking device coinpi'ising ;in insijf extending hrough, a plurziiity of groonded e1eeineulnting block, :i bridge. member secnred to the i sulntmg braci; end having a iiut tace dispofied upposil'o S :term :i member bez (led "with aid gronnded elecrrodes to Vpark gnps, smd bridge' :1, plerulity of electro-deb. und a second bridge nieinbei' seugufeil to one end ot the insuleting block und having :z cenrrel recees to receive the continuous end ot' said. central electrode. said bridge member also having :i izit. face disposed opposite the elcctrodes ot 'the first bridge member to form sp i'lr gepe, the first,

meinbm'being intenposed between the second brid member end the first mentioned ;rrounded electi'odcs. v

my hand in presencc ot tir-:o sub ln lestiinony Whereoif I have b wii neeees.

. 'n ei eunto set i'ibx ng HENRY H. MGRETON.

lVitnesees I WM. S. Homme, limo. E. Rromion 

